Navigation Links
Scientists Spot Eyes' Motion Sensors
Date:10/11/2007

Tough-to-detect cells do the job, physicists say

THURSDAY, Oct. 11 (HealthDay News) -- U.S. scientists say they've identified a type of retinal nerve cell that helps humans, monkeys and apes see motion.

The discovery of this "upsilon cell" may help improve understanding of vision in humans and other primates. The finding, by high-energy physicists at the University of California, Santa Cruz, and neuroscientists at the Salk Institute in La Jolla, Calif., was published in the Oct. 10 issue of the Journal of Neuroscience.

There are only a small number of upsilon cells, which makes them difficult to find when using traditional techniques. The discovery was made using a new detection system -- with 512 electrodes on an area about the size of a pinhead -- inspired by the UCSC scientists' research looking for particles in high-energy-physics collisions.

"This has been a fantastic journey through high-energy physics, neurobiology, technology, and human health," study senior author Alan Litke, adjunct professor of physics at UCSC's Santa Cruz Institute for Particle Physics, said in a prepared statement.

Biologists have identified about 22 distinct types of primate retinal nerve cells but only know the functions of about a half dozen of them.

"People have looked at cell morphology, but that can't tell us in any detail how the cell responds to light," Litke said. "If we're interested in how the retina is processing visual information, we really want to focus a movie on it and see what it reacts to -- to find out if it's seeing color, responding to motion, or whatever it might be doing."

Litke and his colleagues projected simple movies through a microscope lens and onto a patch of retina. As the rod and cone cells picked up the images, they sent electrical signals to different kinds of retinal nerve cells. Further research revealed the presence and distribution of the upsilon cells and their likely role in detecting motion.

More information

The Washington University School of Medicine in St. Louis has more about the eyes.



-- Robert Preidt



SOURCE: University of California, Santa Cruz, news release, Oct. 9, 2007


'/>"/>
Copyright©2007 ScoutNews,LLC.
All rights reserved

Related medicine news :

1. Nobel Prize for Medicine shared by Three scientists
2. Scientists plan human cloning clinic in the United States
3. Scientists crack mechanism of Leptin-Obesity Hormone
4. Scientists use plant hormones to fight cancer
5. American scientists alter gene makeup of babies
6. Expose on eating disorders!! Scientists trace “brain’s eating control center pathway”
7. Scientists found ancient Human Germ Killer
8. Scientists locate key hormone involved in appetite control
9. Scientists open the book of life
10. Electronic nose by Italian scientists
11. Scientists review SARS
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/23/2017)... ... March 23, 2017 , ... ... families and businesses of the Norwalk and Vermillion areas, celebrates the newest ... (N.O.R.A.) is a nonprofit, community-based substance abuse prevention and peer recovery support ...
(Date:3/23/2017)... ... March 23, 2017 , ... ... SmartBen NOW, an innovative mobile app and centralized benefits dashboard solving one of ... information securely from multiple locations. For the first time, employees can access up-to-date ...
(Date:3/23/2017)... ... March 23, 2017 , ... ... Los Angeles based healthcare technology company California Healthcom Group (CHG). , The ... and healthcare arena. With headquarters in California, CHG is a growing, internationally recognized ...
(Date:3/23/2017)... ... ... The TouchPoint Solution, home of Buzzies *, is boosting the Arizona ... “Buzzies change the way we interact with stress and live our day-to-day lives,” said ... in December 2016, The TouchPoint Solution has sold more than $750,000 in product sales. ...
(Date:3/23/2017)... ... March 23, 2017 , ... March 23, ... enables organizations to easily reprint customer invoices, bills, statements and other correspondence when ... the steps needed to retrieve and print the documents and batch them for ...
Breaking Medicine News(10 mins):
(Date:3/23/2017)... 23, 2017 Research and Markets has announced ... - Industry Forecast to 2025" report to their offering. ... The Global Cryostat ... over the next decade to reach approximately $3.5 billion by 2025. ... for all the given segments on global as well as regional ...
(Date:3/23/2017)... March 23, 2017 The key factors ... increasing diabetic population, accelerating economic growth and increasing healthcare expenditure. ... are higher life expectancy of ESRD patients, rising demand for ... However, the expansion of the market is hindered by high ... ...
(Date:3/23/2017)... , March 23, 2017  Transportation Insight, a ... an end-to-end supply chain management firm with expertise serving ... Product Solutions Rick Zaffarano was named a ... the Supply Chain by the only publication exclusively dedicated ... food supply chain. "Rick has brought to ...
Breaking Medicine Technology: